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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <h1>1</h1>
    <h2>2</h2>
    <h3>3</h3>
    <h4>4</h4>
    <h5>5</h5>
    <h6>6</h6>

    <ul>
        <li>123</li>
        <li>123</li>
        <li>123</li>
    </ul>
    <ol>
        <li>456</li>
        <li>456</li>
        <li>456</li>
    </ol>
    <dl>
        <dt>标题</dt>
        <dd>内容</dd>
    </dl>
</body>

</html>